import { debounce } from 'lodash-es'

/**
 * How to use
 * <el-table height="100px" v-el-height-adaptive-table="{bottomOffset: 30}">...</el-table>
 * el-table height is must be set
 * bottomOffset: 30(default)   // The height of the table from the bottom of the page.
 */

const doResize = (el, binding, vnode) => {
  const { componentInstance: $table } = vnode

  const { value } = binding

  if (!$table.height) {
    throw new Error('el-$table must set the height. Such as height=\'100px\'')
  }
  const bottomOffset = (value && value.bottomOffset) || 30

  if (!$table) { return }

  const height = window.innerHeight - el.getBoundingClientRect().top - bottomOffset

  setTimeout(() => {
    $table.layout.setHeight(height)
    $table.doLayout()
  }, 0)
}

export default {
  bind (el, binding, vnode) {
    el.resizeListener = debounce(() => {
      doResize(el, binding, vnode)
    }, 100)
    // parameter 1 is must be "Element" type
    window.addEventListener('resize', el.resizeListener)
  },
  inserted (el, binding, vnode) {
    doResize(el, binding, vnode)
  },
  unbind (el) {
    window.removeEventListener('resize', el.resizeListener)
  }
}
